256667067662 has 32 divisors (see below), whose sum is σ = 400093815744. Its totient is φ = 123394297600.

The previous prime is 256667067661. The next prime is 256667067673. The reversal of 256667067662 is 266760766652.

It is a super-2 number, since 2×256667067662² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256667067661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19864028 + ... + 19876944.

It is an arithmetic number, because the mean of its divisors is an integer number (12502931742).

Almost surely, 2^256667067662 is an apocalyptic number.

256667067662 is a deficient number, since it is larger than the sum of its proper divisors (143426748082).

256667067662 is a wasteful number, since it uses less digits than its factorization.

256667067662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16444.

The product of its (nonzero) digits is 45722880, while the sum is 59.

The spelling of 256667067662 in words is "two hundred fifty-six billion, six hundred sixty-seven million, sixty-seven thousand, six hundred sixty-two".